Comparing Roundabout and Metered Roundabout Performance under Different Traffic Conditions

Abstract

This paper reports results of research comparing the performance of an intersection under two types of control, roundabouts and metered roundabouts. The experimental design evaluated a four-leg at-grade roundabout with several traffic congestion levels and different traffic distribution scenarios on the approaches using SIDRA INTERSECTION. The research found that benefits from roundabout metering depends on demand flow patterns and levels. The cases when roundabout metering may not be beneficial are identified.